Question

我浏览了大约30个网页和50篇关于此的文章，它仍然无法正常工作。

这是我的代码，它非常简单，我只是一个Spring初学者。

App.java

@"movie"

SampleSimpleApplication.java

package com.procus.spring.simple.simple;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 *
 * @author procus
 */
public class App {

    public static void main(String[] args) {
        ApplicationContext con = new ClassPathXmlApplicationContext("SpringBeans.xml");
        SampleSimpleApplication sam = (SampleSimpleApplication) con.getBean("sam");
        sam.run(args);
    }
}

HelloWorldService.java

package com.procus.spring.simple.simple;

import com.procus.calculator.basic.BasicCalculator;
import com.procus.spring.simple.simple.service.HelloWorldService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@EnableAutoConfiguration
@ComponentScan(basePackageClasses = BasicCalculator.class)
public class SampleSimpleApplication implements CommandLineRunner {


    // intentional error
    @Autowired
    BasicCalculator calculator;


    // Simple example shows how a command line spring application can execute an
    // injected bean service. Also demonstrates how you can use @Value to inject
    // command line args ('--name=whatever') or application properties

    @Autowired
    private HelloWorldService helloWorldService;

        public SampleSimpleApplication() {
        }


    @Override
    public void run(String... args) {
        System.out.println(this.helloWorldService.getHelloMessage());
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(SampleSimpleApplication.class, args);
    }
}

SpringBeans.xml

package com.procus.spring.simple.simple.service;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.stereotype.Component;

@Component
@Configuration
@PropertySource(value = { "classpath:application.properties" })
public class HelloWorldService {

    @Value("${app.name:World}")
    private String name;


    public String getHelloMessage() {
        return "Hello " + this.name;
    }

    /**
     * @param name the name to set
     */
    public void setName(String name) {
        this.name = name;
    }

    @Bean
    public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
        return new PropertySourcesPlaceholderConfigurer();
    }

}

在resources文件夹中是我的application.properties文件，其中只包含 app.name = Phil

线程“main”中的异常 org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException：来自类路径资源[SpringBeans.xml]的XML文档中的第12行是无效;嵌套异常是org.xml.sax.SAXParseException; lineNumber：12; columnNumber：81; cvc-complex-type.2.4.c：匹配通配符是严格的，但是找不到元素的声明 '上下文：属性占位符'。

我真的尝试过在stackoverflow和其他几个论坛上找到的大多数解决方案。我春天真的很新，我会感激任何帮助。

Answer 1

我无法发表评论 - 我所看到的是你在写：<context:property-placeholder location="classpath*:application.properties"/>

为什么在类路径之后有*。它应该与 - <context:property-placeholder location="classpath:application.properties"/>

一起使用

其他 -

您可以使用 -

    <bean class="org.springframework.context.support.PropertySourcesPlaceholderConfigurer">
  <property name="locations">
    <list>
      <value>classpath:application.properties</value>
    </list>
  </property>
  <property name="ignoreUnresolvablePlaceholders" value="true"/>
</bean>

在你的Heloworld bean中

 <bean id="helloworld" class ="package.HelloWorldService" >
         <property name="name" value="${app.name}" />
    </bean>

Answer 2

在您的springbeans.xml中，您已将位置指定为"classpath*:application.properties"类路径，并在HelloWorldService.java "classpath:application.properties"中将位置指定为http://www.springframework.org/schema/context/spring-context-4.0.xsd。这两个地方存在差异。

除了问题在于SpringBeans.xml模式声明。这是不正确的＆amp;不完整的。在缺少上下文声明<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">之后检查this this＆amp; this

理想情况下应该是

C11

可以在元素'context：property-placeholder'中找到声明。春天4

2 个答案: